Module 19: Number linesMath 2B  Course Guide
Module Overview:
In this module, students will show how sums can be represented as lengths on a number line and use number lines to solve addition and subtraction word problems. They will also show how differences can be represented as lengths on a number line and create, use, and explain an open number line.
Module Materials:
Lesson #  Lesson Title  Material(s) 

1  Sums Using a Number Line 
counter *Math 2B Workbook, ISBN 9781639161232 (optional) 
2  Solve Word Problems by Adding  None 
3  Differences Using a Number Line  counter; 
4  Number Lines  None 
5  Solve Word Problems by Subtracting  None 
Module Objectives:
Lesson #  Lesson Title  Objective(s) 

1  Sums Using a Number Line 

2  Solve Word Problems by Adding 

3  Differences Using a Number Line 

4  Number Lines 

5  Solve Word Problems by Subtracting 

Module Key Words:
Key Words 

number line open number line 
Module Assignments:
Lesson #  Lesson Title  Page #  Assignment Title 

1  Sums Using a Number Line  4  HandsOn 
2  Solve Word Problems by Adding  4  HandsOn 
3  Differences Using a Number Line  4  HandsOn 
4  Number Lines  4  HandsOn 
5  Solve Word Problems by Subtracting  4  HandsOn 
Learning Coach Notes:
Lesson #  Lesson Title  Notes 

1  Sums Using a Number Line  
2  Solve Word Problems by Adding  In their math notebook, have your student write the steps to solving addition word problems using a number line. 
3  Differences Using a Number Line  Ask your student to show you how to subtract numbers on a number line. 
4  Number Lines  Ask your student to explain what an open number line is and how they can use it to help them add and subtract. 
5  Solve Word Problems by Subtracting  In their math notebook, have your student write the steps to solving subtraction word problems using a number line. 
Module Guiding Questions:
When a student starts a lesson ask them questions to check for prior knowledge and understanding and to review concepts being taught. At the end of the lesson ask the questions again to see if their answer changes.
Lesson Title  Question 

Sums Using a Number Line 

Solve Word Problems by Adding 

Differences Using a Number Line 

Number Lines 

Solve Word Problems by Subtracting 

Module Video Questions:
When a student watches a video take time to ask them questions about what they watched. Suggested questions for the videos in this module are listed here. Suggestion: Have the student watch the entire video first all the way through. Then have them watch the video a second time, as they watch it pause the video and ask the questions.
Lesson Title  Video  Question 

Sums Using a Number Line  Sums Using a Number Line 

Solve Word Problems by Adding  Solve Word Problems by Adding 

Number Lines  Open Number Lines 

Solve Word Problems by Subtracting  Solve Word Problems by Subtracting 

Module Suggested Read Aloud Books:
Take time to read to your student or have them read aloud to you. Read a different book each day. While reading the book point out concepts being taught. You may purchase these books or find them at your local library. Suggested things to discuss while reading the book:
 What is the main idea?
 What are three things new you learned?
 How does this book relate to what you are learning about?
#  Book  Author  Lexile Level 

Module Outing:
Take some time to apply what your student is learning to the real world. Suggested outings are below.
#  Outing 
